# Cursor: Major incident: Elevated errors for Anthropic Models

**Summary:** Cursor reported a major incident affecting Automations, CLI, Cloud Agents, and IDE from 2026-09-03 14:17 UTC to 2026-09-03 16:31 UTC (2 h 14 min). An upstream Anthropic issue caused elevated errors or failed Agent turns for Fable 5.1, Fable 5, Opus 5, Opus 4.8, and Opus 4.6 requests; service was restored. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2026-09-03 14:17 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/rccs4rlhfsj4](https://stspg.io/rccs4rlhfsj4)
- [Company: Cursor](https://rewindex.com/company/cursor.md)
- Versions: before (none: first archived) → after incident\_version:11/0h8jlvzfp1jr@fbbabc560dfe
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Elevated errors for Anthropic Models
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-09-03 14:17 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-09-03 16:31 UTC
```

**6. Added: Affected components**

```diff
+ Automations, CLI, Cloud Agents, IDE
```

**7. Added: Update** (investigating) · 2026-09-03 14:17 UTC

```diff
+ An upstream Anthropic issue is causing elevated errors for Fable 5.1, Fable 5, Opus 5, Opus 4.8, and Opus 4.6 requests. Some users may experience errors or failed Agent turns. We're monitoring recovery and will provide updates.
```

**8. Added: Update** (investigating) · 2026-09-03 15:55 UTC

```diff
+ Anthropic reports recovery across most models. The affected models right now are Opus 4.8 and Opus 5. Please see https://status.claude.com/ for provider updates.
```

**9. Added: Update** (resolved) · 2026-09-03 16:31 UTC

```diff
+ Elevated errors affecting Anthropic models have been resolved. Service has been restored.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-09-03 14:17 UTC | Major incident: Elevated errors for Anthropic Models (this change) | outage |

All Cursor changes: [timeline](https://rewindex.com/company/cursor/changes.md)
_Diff excerpts are shown on normalized text: dates, counters and tokens appear as ‹date›, ‹count›, ‹tok›; noise-only edits are hidden. Rewindex shows the changed passages, not a copy of the page._


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Canonical: https://rewindex.com/change/i3b5c2a37579356 · Markdown: https://rewindex.com/change/i3b5c2a37579356.md · JSON: https://rewindex.com/api/v1/changes/i3b5c2a37579356 · Generated 2026-10-18T03:29:07.943Z